Caption only: Shuttle crew prepares for possible tricky landing

James Pawelczyk, left, makes his way down the ceiling of Columbia Saturday as space shuttle crew members stow equipment to ready for landing at Kennedy Space Center at 10:09 a.m. MDT today. A hydraulic system malfunctioned on the shuttle, leaving the astronauts with less power. Mission Control said the problem will force changes in landing procedures but will not threaten safety unless another system fails.